Detecting Ce3+ as a biosignature mimicker using UV time-resolved laser-induced fluorescence and Raman spectroscopy: Implications for planetary missions
Sign Up to like & getrecommendations! Published in 2021 at "Icarus"
DOI: 10.1016/j.icarus.2020.114093
Abstract: Abstract Combined UV Raman and laser-induced fluorescence (LIF) spectroscopy instruments will soon be launched onboard missions to planetary surfaces, including Mars, to search for biosignatures. However, the rare earth element Ce3+, found in many common… read more here.
Keywords: ce3; fluorescence; biosignature; spectroscopy ... See more keywords
The case and context for atmospheric methane as an exoplanet biosignature
Sign Up to like & getrecommendations! Published in 2022 at "Proceedings of the National Academy of Sciences of the United States of America"
DOI: 10.1073/pnas.2117933119
Abstract: Significance Astronomers will soon begin searching for biosignatures, atmospheric gases or surface features produced by life, on potentially habitable planets. Since methane is the only biosignature that the James Webb Space Telescope could readily detect… read more here.
Keywords: biosignature; context atmospheric; methane; case context ... See more keywords
Imaging of Vanadium in Microfossils: A New Potential Biosignature.
Sign Up to like & getrecommendations! Published in 2017 at "Astrobiology"
DOI: 10.1089/ast.2017.1709
Abstract: The inability to unambiguously distinguish the biogenicity of microfossil-like structures in the ancient rock record is a fundamental predicament facing Archean paleobiologists and astrobiologists. Therefore, novel methods for discriminating biological from nonbiological chemistries of microfossil-like… read more here.
Keywords: astrobiology; like structures; biosignature; vanadium ... See more keywords
Trace Element Concentrations in Hydrothermal Silica Deposits as a Potential Biosignature.
Sign Up to like & getrecommendations! Published in 2019 at "Astrobiology"
DOI: 10.1089/ast.2018.1994
Abstract: Uncovering and understanding the chemical and fossil record of ancient life is crucial to understanding how life arose, evolved, and distributed itself across Earth. Potential signs of ancient life, however, are often challenging to establish… read more here.
Keywords: hydrothermal silica; biosignature; silica deposits; ancient life ... See more keywords
Characterization of the Halochromic Gloeocapsin Pigment, a Cyanobacterial Biosignature for Paleobiology and Astrobiology.
Sign Up to like & getrecommendations! Published in 2022 at "Astrobiology"
DOI: 10.1089/ast.2021.0061
Abstract: Ultraviolet (UV)-screening compounds represent a substantial asset for the survival of cyanobacteria in extreme environments exposed to high doses of UV radiations on modern and early Earth. Among these molecules, the halochromic pigment gloeocapsin remains… read more here.
Keywords: characterization halochromic; astrobiology; pigment; biosignature ... See more keywords
Directional Aspects of Vegetation Linear and Circular Polarization Biosignatures.
Sign Up to like & getrecommendations! Published in 2022 at "Astrobiology"
DOI: 10.1089/ast.2021.0156
Abstract: Homochirality is a generic and unique property of all biochemical life and it is considered a universal and agnostic biosignature. Upon interaction with unpolarized light, homochirality induces fractional circular polarization in the light that is… read more here.
Keywords: vegetation; phase angle; biosignature; circular polarization ... See more keywords
Environmental and Mineralogical Controls on Biosignature Preservation in Magnesium Carbonate Systems Analogous to Jezero Crater, Mars.
Sign Up to like & getrecommendations! Published in 2023 at "Astrobiology"
DOI: 10.1089/ast.2022.0111
Abstract: Jezero Crater on Mars is a paleolacustrine environment where Mg-carbonates may host evidence of ancient life. To elucidate the environmental and mineralogical controls on biosignature preservation, we examined samples from five terrestrial analogs: Lake Salda… read more here.
Keywords: jezero crater; biosignature preservation; biosignature; crater mars ... See more keywords
Validating a biosignature predicting placebo pill response in chronic pain in the settings of a randomized controlled trial.
Sign Up to like & getrecommendations! Published in 2021 at "Pain"
DOI: 10.1097/j.pain.0000000000002450
Abstract: ABSTRACT The objective of this study is to validate a placebo pill response predictive model - a biosignature - that classifies chronic pain patients into placebo-responders (predicted-PTxResp) and non-responders (predicted-PTxNonR), and test whether it can… read more here.
Keywords: trial; response; treatment; biosignature ... See more keywords
Differences in the Volatilomic Urinary Biosignature of Prostate Cancer Patients as a Feasibility Study for the Detection of Potential Biomarkers
Sign Up to like & getrecommendations! Published in 2023 at "Current Oncology"
DOI: 10.3390/curroncol30050370
Abstract: Prostate cancer (PCa) continues to be the second most common malignant tumour and the main cause of oncological death in men. Investigating endogenous volatile organic metabolites (VOMs) produced by various metabolic pathways is emerging as… read more here.
Keywords: prostate cancer; differences volatilomic; pca; biosignature ... See more keywords